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Inhalt: - Zum Wissenschaftsbegriff der älteren Pädagogik - Religiöse und ständische Elemente des überlieferten Praxisanspruchs - Ist praktisches Engagement rationalisierbar? - Zur pädagogischen Kritik der „positiven Wissenschaft" - Zum praktischen Wert von Forschung - Zum Gegenstand der Erziehungswissenschaft
An existence and uniqueness theory is developed for general nonlinear and nonautonomous differential-algebraic equations (DAEs) by exploiting their underlying differential-geometric structure. A DAE is called regular if there is a unique nonautonomous vector field such that the solutions of the DAE and the solutions of the vector field are in one-to-one correspondence. Sufficient conditions for regularity of a DAE are derived in terms of constrained manifolds. Based on this differential-geometric characterization, existence and uniqueness results are stated for regular DAEs. Furthermore, our not ons are compared with techniques frequently used in the literature such as index and solvability. The results are illustrated in detail by means of a simple circuit example.
Rat serum, in which the complement sytem had been activated by incubation with zymosan, increased the glucose and lactate output, and reduced and redistributed the flow in isolated perfused rat liver clearly more than the control serum. Heat inactivation of the rat serum prior to zymosan incubation abolished this difference. Metabolic and hemodynamic alterations caused by the activated serum were dose dependent. They were almost completely inhibited by the cyclooxygenase inhibitor indomethacin and by the thromboxane antagonist 4-[2-(4-chlorobenzenesulfonamide)-ethyl]-benzene-acetica cid (BM 13505), but clearly less efficiently by the 5’-lipoxygenase inhibitor nordihydroguaiaretic acid and the leukotriene antagonist N-{3-[3-(4-acetyl-3-hydroxy-2-propyl-phenoxy)-propoxy]-4-chlorine-6-methyl-phenyl}-1H-tetrazole-5-carboxamide sodium salt (CGP 35949 B). Control serum and to a much larger extent complement-activated serum, caused an overflow of thromboxane B₂ and prostaglandin F₂α into the hepatic vein. It is concluded that the activated complement system of rat serum can influence liver metabolism and hemodynamics via release from nonparenchymal liver cells of thromboxane and prostaglandins, the latter of which can in turn act on the parenchymal cells.
Zur Renaissance des idiographischen Ansatzes in der Persönlichkeitsforschung : eine Zwischenbilanz
(1991)
Περιεχόμενα: 1. Εισαγωγικές παρατηρήσεις 2. Ποσοτικά δεδομένα 3. Η σχολική κατάσταση κατά τη μετανάστευση 3.1. Η κατάσταση στο κανονικό γερμανικό σχολείο 3.2. Διδασκαλία μητρικής γλώσσας, εθνικές τάξεις και εθνικά σχολεία στην Ομοσπονδιακή Δημοκρατία της Γερμανίας 4. Η κατάσταση μετά την παλιννόστηση 4.1. Η κατάσταση στο κανονικό ελληνικό σχολείο 4.2. Ειδικά μέτρα για παλιννοστούντα παιδιάστην Ελλάδα 5. Ανακεφαλαίωση - συμπεράσματα
Meine empirische Analyse von w-Fragen im Kontext von Frage-Antwort-Sequenzen aus natürlichen informellen Alltagsgesprächen resultiert in der Dekomponierung der konversationeilen Frage in ihre für die Produktion und Interpretation der damit vollzogenen Aktivität konstitutiven Merkmale. Diese stammen aus vier autonomen Signalisierungssystemen: (1) syntaktische Struktur, (2) semantische Beziehung zum Vorgängerturn, (3) prosodische Struktur und (4) die Antwort im Folgetum. Aktivitätstyp-unterscheidende Strukturen aus diesen vier Systemen werden in Kookkurrenz miteinander verwendet zur Herstellung und Signalisierung jeweils spezifischer Aktivitätstypen mit jeweils unterschiedlichen sequentiellen Implikationen im Hinblick auf die spezifische konditionell relevante Antwort im Folgeturn. Meine Analyse zeigt, daß einige in der Linguistik bisher i.d.R. unhinterfragt vorausgesetzte Annahmen zum Zusammenhang von Grammatik und Prosodie bzw. Intonation nicht haltbar sind. Intonation steht nicht in einer systematischen Beziehung zu Satztypen bzw. Satzmodi und auch nicht zu bisher oft herangezogenen pragmatischen "Verlegenheitskategorien" wie 'Höflichkeit' o.a. Vielmehr muß Prosodie als unabhängiges Signalisierungssystem betrachtet werden, aus dem Interaktionspartner Strukturen frei auswählen, um diese auf interaktiver Ebene in Kookkurrenz mit anderen Signalen als aktivitätstyp-unterscheidende Merkmale zur Herstellung interaktiv unterschiedlicher Fragetypen zu verwenden.
Bisherige Ergebnisse der kognitiven Altersforschung erlauben keine Schlußfolgerung darüber, ob die Größe und Robustheit der Altersverluste in kognitiven Basisprozessen irreversibel sind und folglich als Indikatoren neurobiologischer Grenzen des alternden Organismus interpretiert werden können: Durch die Forschungsstrategie des Testing-the-Limits wurden im Zusammenhang mit einer kognitiven Intervention zuverlässige Ergebnisse bezüglich alterskorrelierter Grenzen kognitiver Entwicklungskapazität erwartet. Gesunde ältere und junge Erwachsene nahmen an 38 über ein Jahr verteilten experimentellen Sitzungen teil, in denen sie in einer Gedächtnistechnik, der Methode der Orte, trainiert und wiederholt getestest wurden. Die Kriteriumsaufgabe war das Behalten langer Wortlisten auf der Grundlage der Erzeugung phantasievoller Gedankenbilder. Obwohl ältere Erwachsene in der Lage waren, die Gedächtnistechnik zu erwerben, zeigte sich unter Testing-the-Limits- Bedingungen eine nahezu vollständige Entzerrung der Leistungsverteilungen junger und älterer Erwachsener, die auch durch langfristiges Training nicht abgebaut wurde. Die Ergebnisse werden in Hinblick auf (1) die Bedeutung spezifischer kognitiver Basisprozesse, (2) Kohorten- bvs. biologische Alterseffekte und (3) mögliche Ausnahmen vom Altersabbau diskutiert.
Elderly adults (N = 116; average age = 73 years) were randomly assigned to one of four treatment groups varying in the amount of training and testing on fluid intelligence tests. They were compared before and after treatment on self-efficacy and utility beliefs for intelligence tests and everyday competence. Although both ability training and extended retest practice resulted in significant gains in objective test performance (Baltes, Kliegl, & Dittmann-Kohli, 1988), only ability training resulted in positive changes in self-efficacy. However, these changes were restricted to testrelated self-efficacy. Training had no impact on perceived utility or on everyday self-efficacy beliefs. Implications of the results are discussed with regard to interventions to increase intellectual self-efficacy in elderly persons.
We investigated the role of training-induced knowledge Schemas and encoding time on adult age differences in recall. High-plausible (schema coherent) words were recalled better than lowplausible (schema discrepant) words in both age groups. This difference was larger for old-adults than for young adults for presentation times ranging from 3 s to 11 s per word. After equating participants in overall recall (i.e., at 50% correct) by dynamic adjustment of presentation time, old adults again showed a stronger plausibility effect than young adults when recall was above criterion. In a second experiment with self-paced encoding, old adults used more time than young adults only for low-plausible pairs, yet they still remembered fewer of them. In a third experiment, both age groups preferred to imagine high- rather than low-plausible words, but this effect was more pronounced in old adults. The results indicate that, compared with young adults, old adults find it particularly difficult to form elaborative mental images of schema-discrepant information under a wide variety of time constraints during encoding. Results are discussed in relation to explanations based on age-related mental slowing.
The study investigates police officers' definitions of different rape situations. On the basis of the concept of 'cognitive prototypes' a methodology is developed which elicits consensual feature lists describing six rape situations: the typical, i.e. most common rape, the credible, dubious, and false rape complaints as weil as the rape experiences that are particularly hard vs. relatively easy for the victim to cope with. Qualitative analysis of the data allows the identification of the characteristic features defining the prototype of each rape situation, as weil as comparisons between the situations in terms of their common and distinctive features. It is shown that police officers, while sharing some of the widely held stereotypes about rape, generally perceive rape as a serious crime with long-term negative consequences for the victim. The quantitative analysis of prototype similarity between the six situations corroborates this conclusion by demonstrating a high similarity between the prototypes of the typical and the credible rape situation: In addition, subjects' general attitude towards rape victims is measured to compare the prototypes provided by respondents holding a positive vs. negative attitude towards rape victims. Findings for the two groups, however, reveal more similarities than differences in their descriptions of rape prototypes. The paper concludes with a discussion of the feasibility of the prototype approach presented in this study as a strategy for investigating implicit or common-sense theories of rape.